<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var day = prompt("请输入今天是周几");
        if ( day == 1 || day == 2 ){
            alert("今天吃涮羊肉");
        } else if ( day == 3 || day == 4 ) {
            alert("今天吃火锅");
        } else if ( day == 5 || day == 6 ){
            alert("今天吃烧烤");
        } else if ( day == 7 ){
            alert("今天吃土");
        }
        var score = parseFloat(prompt("请输入考了多少分"));
        if ( score >= 80 && score <= 100 ) {
            alert("优秀");
        } else if ( score < 80 && score >= 70 ){
            alert("良好");
        } else if ( score < 70 && score >= 60 ){
            alert("及格");
        } else if ( score < 60 && score >= 0 ){
            alert("不及格");
        }
    </script>
</body>
</html>